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No. 450,115. Patented Apr. 7, 18911.v

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UNITED STATES PATENT OFFICE.

WARREN H. TAYLOR, OF 4STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE da TOWNE MANUFACTURING COMPANY, OF SAME PLACE.

DOOR-KNOB.

SPECIFICATION forming part of Letters Patent No. 450,115, dated April '7, 1891.

Application led August 18, 1890. Serial No. 362,320. (No model.)

To all whom t may concern:

Be it known that I, WARREN H. TAYLOR, of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Door-Knobs and Attachments, of which the following is a specification, reference being had to the accompanying drawings.

In the drawings, Figure l is a vertical section of a part of a door having my improvements applied to it. Fig. 2 is a view of a spindle having knobs attached to it according to my invention. Fig. 3 is a diametrical section of a knob. Fig. 4 is similar to Fig. 3 except it shows a formal variation where the two concave parts of the knob are joined. Fig. 5 is a section of a part of a knob and shank, and Flg. 6 a plan of the part of the knob shown in Fig. 5. Fig. 7 is a transverse section on the lino 7 7 of Fig. l, showing the details for connecting the shank to the spindle. Fig. Sis a perspective View of the escutcheon plate and sleeve detached, the two parts being a little separated. Fig. 9 is a view of a split spindle detached. Fig. 10 is a sectional view similar to that of Fig. 7, but showing a formal variation.

Referring to the letters upon the drawings, A in Fig. l indicates a section of a door.

B indicates one half part ot` a struck-up sheetmetal door-knob, which is joined at its margins by a rabbet formed within the thickness of the metal, so as to conceal the joint as much as possible to the other half C of the knob, and so that when united there is no projection on the exterior of the knob. The part C is swaged at D to form an enlarged bearing-surface for uniting the knob-shank E to the knob. This union of these parts may be effected by means of a screw-thread, as illustrated in Figs. l, 3, and 4, or by any other usual means. Vhenever desired a pin F may be set into the swaged part of the knob and into the knob-shank to prevent the knob from unscrewing, or any other usual means ot' fastening the screw-threaded parts together to prevent unscrewing may be adopted.

Instead of a screw-threaded connection between the knob and shank a recess may be formed in the knob, and projections II (see Figs. 5 and 6) may be formed upon the swaged part of the knob to lit them. Various other means of fastening the solid metal shank and sheet-metal knob together may be used.

The parts of the knob may be struck up from sheet metal with dies of any desired ornamental pattern and of any desired size to suit the demands ofthe trade.

I indicates a split spindle, which may be A made of two slightly bent parts, as shown in Fig. 2, so that when the knob-Shanks are slipped on to the ends the resiliency of the parts will tend to hold the shanks irmly in position. In addition to that means of holding the shanks and spindles together, I employ a wedge K, adapted to be driven into a wedge-shaped recess L near the end of the spindle, so as to strain the parts of the spindle apart, and thus hold them in place in the knob-shank. This wedge may be either the pointed end of a screw M passing through the shank, or it may be a separate wedge driven by the blunt end of a screw. (Shown in Fig. 10.) I may use a spindle composed of parallel parts, as shown in Fig. 9, but in most cases such a spindle as shown in Fig. 2 is preferable.

In Figs. l and 8, N indicates an escutcheonplate, which may be stamped out of sheet metal in any desired form. This plate is provided with pin-holes O to receive the lugs P upon a sheet-metal sleeve Q, whereby a complete escutcheon-plate and sleeve are formed by riveting the lugs to the plate.

Any other usual means of uniting the wrought-metal sleeve to the wrought-metal plate may be employed. In thismanner I produce economically a Wrought-metal escutcheon complete, composed of a plate and sleeve, each of sheet metal and united together.

A hollow wrought-metal door-knob having a swaged or thickened portion atD for uniting the knob with its shank, substantially as set forth.

In testimony of all which I have hereunto subscribed my name.

WARREN n. TAYLOR'. 

